Liquid-dispensing pump



W. T. HATMAKER LIQUID DlsPENsING PUMP Jan, 27, 192s.

Filed March l2, 1919 3 Sheets-Sheet 1l ATTORNEY Jan, 27, 1925. 1,524,620

W. T. HATMAKER LIQUID DlsPENsING PUMP Filed March l2, 1919 '3 Sheets-Sheet 2 ATTORNEY Jan. 27,1925. 1,524,620

W. T. HATMAKER LIQUID msPENsING Pulk? Filed March l2, 1919 3 Sheets-Sheet 5 Patented Jan. A27, 1925.

UNITED STATES-PATENT OFFICE.

WILLIAM T. HATMAKER, 0F DAYTON, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, T0

THE NATIONAL RECORDING PUMP COMPANY, OF DAYTON, OHIO, A OORPORATION OF OHIO.

LIQUID-DISPENSING PUMI.

Application led March 12, 19,19. Serial No. 282,183.

To all whom 'it may concern:

Be it known that I, WILLIAM T. HAT- Mnmzn, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Liquid-Dispensing Pumps, of which the following is a specification, reference being had therein to the accompanying drawlng.

This invention relates to liquid dispensing pumps. One object of the invention is to provide in connection with such a pum an apparatus which will indicate both the amount of liquid delivered and the price charged for that quantity of liquid.

Another object of the invention is to provide in connection with such a pump an apparatus for making a permanent record of the amount of liquid delivered; and `further, to provide such an apparatus which will deliver a sales slip or check showing the amount of liquid delivered.

Another object of the invention is to provide means for setting the pump to cause it to deliver a predetermined quantity of liquid and to then automatically interrupt the operation of the pumpin mechanism; and further, to provide means or locking the pumping mechanism against operation until the apparatus has been set.

Other objects of the invention will appear as the mechanism is'described in detail.

In the accompanying drawings Fig. 1 is a front elevation partly broken away of a mechanism embodying my invention; Fig. 2 is a side elevation of such mechanism, partly broken away; Fig. 3 is a front elevation of the indicating dials; and Fig. 4 is a vertical section taken centrally through the recording mechanism.

In these drawings I have illustrated one embodiment of my invention and have shown the same as applied to a liquid dispensing apparatus similar to that shown and described in the Patent No. 1,316,032 granted to me Sept. 16, 1919, but it will be' obvious that with little or no modiication the invention can be applied to dispensing apparatuses of various kinds.

The particular dispensing apparatus here 'shown comprises a double-cylinder doubleacting pump in which the operating device moves continuously in a forward direction and the movement of the pistons is automatically reversed at the end of each stroke. I have, however, shown only so much of this mechanism as standing of the present invention. The cylinders and their pistons are not shown, but each piston is rovided with a rack 1, the two racks mes ing with the opposite sides of a gear 2, which serves to move the racks, and, consequently, their pistons, simultaneously in opposite directions. The

operating mechanism for the gear comprisesl p a shaft 3 which may be provided with a crank or other suitable operating device, not here shown, and on which is slidably mounted a pinion 4 adapted to mesh either with a gear 5 rigidly secured to the gear 2 or with an idle gear 6 having secured thereto a. second gear 7 which in turn meshes with the gear 2. It will be obvious tha/t the rotation of the shaft 3 and pinion 4 in one direction will serve to rotate the gear 2 in one direction so long as the pinion is in mesh with the gear 5 and will serve' to rotate the gear 2 in the opposite direction when the pinion is in mesh with the gear 6. The pinion is automatically shifted from one position to the other at the end of each stroke of the pistons. This mechanism' comprises a lever 8 constituting one arm of a bell crank lever and comprising two parts having pins 9 to enter a groove 1Q in an elongated hub or sleeve 11 secured to the pinion 4. The other arm of the bell crank lever, which is shown at 12, is connected through the medium of an arm 13 with a lever 14 mounted for movement about the axis of the gear 2 and having parts 15 lying in the path of a stop 16 secured to the gear 5 and adapted to be engaged thereby to impart initial movement to the lever. The connection between the arms 12 and 13 may be of any suitable character. As here shown, the arm 12 carries a pin 112 which lies between two pins 113 on the arm 13. The end of the arm 13 lies between two pins 114, on the arm 14, which are spaced apart to permit of a limited relative movement of the arms. The arm 14 is so arranged with relation to the gear 2 that one or the other of the parts 15 of the varm will be engaged by the stop 16 just before the gear completes its movement in either direction and causes the arm to move with the gear until the arm has passed a position midway is necessary to an underbetween the limits of its movement, after which the final movement will be impartedV 114 on the arm 14 will not engage the arm,

13 until the arm 14 is in an intermediate position and, consequentllly, this initial movenient of the arm 14 wi not impart movement to the pinion 4. The final movement is im arted to the lever by a spring 17 lconnected with the free end of a crank arm 18 which is mounted on a shaft 19 and which is so arranged that the spring 17 will be placed under greater tension as the arm 18 passes a point midway between the limits of its movement and, consequently, as soon as the arm passes this point the spring will become operative and will complete the movement of the arm and of the lever 14, and this movement will cause thepinion 4 to be shifted from onepposition'to the other, and thus reverse the direction of movement of the racks and of the pistons in the cylinders. As has been stat/ed the mechanism so far described forms a part of my Patent No. 1,316,032, and is here shown only for Vthe purpose of explaining the operation of the present inventlon.

In order to indicate to the customer both the amount of liquid which is delivered to him and the price of that amount of liquid, I have provided a register or indicating device, the operation of which is controlled by the pumping mechanism. As here shown, this indicating device comprises a double scale or fixed indicator, the outer portion 20 of which bears the numerals O to 19, and the inner portion 21 of which bears iigures indicatin the rice of each quantity of liquid in icated y the figures on the outer portion of the scale. Any desired unit of measurement may be employed but, in the present instance, the figures on the outer portion of the indicator represent Vgallons and the figures on the inner portion thereof represent the price computed at 251/212! per gallon. Inasmuch as the price of any commodity is liable to fluctuation, I have made the inner portion of the fixed indicator removable so that it can be changed as the price changes. As here shown, it consistsmerely of a disk adapted to fit within the outer circular ortion of the fixed indicator, and is provi ed with openings to receive studs 22 which secure it in position and hold it against rotation. Cooperating with the'lixed indicator is a movable indicator which is here'shown as a pointer 23 which is rigidly secured to and moves with a shaft 24. The two indicating members may be mounted in any suitable manner. As here shown, the fixed indicator is secured to and formsa part ofa plate or member 25, which forms a part of the frame which supports the indicating and recordinI devices, and is provided with an outwardly extending flange 26 within which'the removable disk is arranged. The

29 mounted for movement about the axisof' the shaft 24. This pawl is here shown as pivotally mounted lon a. plate or arm 30. A detent pawl 31 also engages the ratchet wheel to hold it against rearward movement. The two pawls are acted upon by a spring 32, which extends between them and serves to hold both in engagement with the ratchet wheel, but'to permit them to yield and ride over the teeth of the ratchet wheel. The pawl carrying arm 30 may be actuated in any suitable manner, but is here shown as having connected therewith .a rod 33 which extends downwardly and is so connected with a moving part of the pumping brace the shaft 19 of the. reversing mechanism for the gear 2, this forked end of the bar serving to support and guide the same. The shaft 19 is provided with suitable means for engaging the bar 33 and imparting upward movement thereto upon each movement of the arm 18, in either direction, thus causing the movable indicator to be advanced one step upon each reversal of the direction of movement of the pistons.

It is very desirable in an apparatus of this kind to provide means for making and retaining a permanent record of the amount of liquid dispensed, and it is also desirable that the customer shouldvbe provided with a record from the-machine itself, showing the amount of-liquid which it has delivered. To accomplish this I have provided a recorder adapted to print the record on two the customer. As here shown, this recording mechanism comprises two recording wheels 39v and 40. (Fig. 4) each of which bears on its periphery printing characters or type corresponding` to the indications on the outerl portion of the fixed indicator 20, and which in the present instance are the numerals 0 to 19. These counter wheels are preferably rigidly connected one to the other and, in the present, instance, are shown as formed integral. They are mounted on the shaft 24 and rigidly connected with the ratchet wheel 28 so as to rotate therewith. Meansl are provided for feedin a strip of paper across the printing point of each counter wheel, 39 and 40. As here shown, the counter wheel 39 prints the permanent-record, which is retained within the machine, and the counter wheel 40 prints the sales slip or check. The permanent record is printed on a strip of paper 4.1 Which is taken from a roll 42` and carried about guides 43 and 44 to rewinding drum 45. The sales slip is printed on a strip of paper 46 which is taken 't'rom a roll 47 and carried about a guide 48 through a slot 49 in the'frame member 25 and indicator disk 2l. Interposed between the two strips and the respective counter wheels is an ink ribbon 50 which passes about an actuating drum 51, thence about guides 52 which properly position it with respect to the two printing wheels. Preferably, an inking roller 53 is mounted in engagement with the ribbon to provide the same with tresh ink. The impression may be taken with any suitable apparatus but, as here shown, I have provided platens 54 and 55 to take the impression on the permanent record strips and the sales slip, respectively. These platens are mounted respectively on the ends of arms 56 and 57 which are pivotally mounted at their opposite ends and which are provided with projections or noses 58 and 59 adapted tobe engaged by a. do-uble cam 60. A spring G1 extends between the two arms and tends to move the platens toward the type wheels, but when the cam 60 is in its normal or idle position, the high points `thereof will be in contact with the projections on the platen arms and will hold the latter in their outermost or separated positions. Upon forward movement being imparted to the cam, the high portions thereof will clear the projections on the respective platen arms and permit the platens to be moved inwardly by the spring 61, which will result in an impression being taken from each type wheel. This cam may be operated in any suitable manner but, as here shown', I have connected therewith an actuating shaft or rod 62 which extends rearwardly from the recording devices and through the wall of the casing, where it is provided with an angular head 63 to receive an actuating key or handle. The record strips may be advanced in various ways, but I prefer to advance thc permanent record strip by theoperation of the platen arm 56 and, to this end, I have provided the rewinding drum 45 with a ratchet wheel 64 with which cooperates a pawl 65 carried by an arm or pawl carrying plate 66 journaled on the axis of the drum and connected with one end of a link 67, the opposite end of which is connected with an arm 68 which, in the present instance, is pivoted on the shaft which carries the roll 42 and has connected therewith a second arm 69 which is connected with a rock arm 70 mounted on the axis of the platen arm 56 and rigidly connected therewith. The arrangement is such that the operative movement of the platen arm, that is, the movement of the pla-ten into engagement with the type wheel, will cause the pawl to be retracted and, as the platen arm is restored to its normal or idle position by the cam 60, the pawl will be moved forward and the ratchet wheel and the drum 45 advanced, thus feeding the paper forward. The ribbon 50 is here shown as actuated in the same manner and from the same mecha!" nism. The ribbon drum 5l is provided with a ratchet wheel 71, with which cooperates a spring-pressed pawl 72 carried by an arm 73, which is connected by a link 7 4 with the plate or pawl carrying arm 66 ot the rewinding drum 45. Consequently, the ribbon will be ted forward upon each :torward movement of the record strip. In the particular construction here shown, I have. not provided any automatic feed for the sales slip, but this may be drawn out by hand and torn 0E. Obviously, however, an automatic feed can be applied thereto if so desired.

To prevent the movement of the pumping mechanism from being' continued after the full quantity oct liquid has been delivered to the customer, I have provided controlling means for the pump mechanism, which may be set to cause the operation of the pump to be automatically interrupted when a predetermined quantity of liquid has been delivered. I also prefer that this mechanism shall be oi such a character as to positively lock the pumping mechanism against operation-until the device has been so set. This device may take various forms but` as here shown, it comprises a rotatable member which is preferably in the form of a disk 75 and is rotatably and slidably mounted on the end of the shaft 24, which carries the counter wheels 39 and 40. The face of the disk 75 lies substantially parallel with and adjacent toy the. face of the counter wheel 39 and is held normally in this position by means o't a spring 76 coiled about the end of the shaft 24 within the hollow hub 77 of the the counter Wheel.

secured .thereto a pin 79 adapted to extend4 into any one of a series of recesses 80 formed in the adjacent face of the counter wheel 39 and arranged in annular series, there being one of these recesses for each ty e face on Connected with the rotatable member 75 is a rod or shank 81 extending outwardly throu h an opening in the casing and provided with a handle 82, by

means of which the rotatable member or disk 75 may be drawn outwardly to disengage the pin 79 from the counter wheel, and then rotate it to cause the pin to engage the recess in the counter wheel adjacent to the numeral or type face corresponding to the number of gallons of liquid it is desired to deliver. The position of the pin 79 with. relation to the counter' wheel is indicated by a pointer 83 connected with the handle 82 and travelling over a scale on the wall of the casing, which is no-t here shown. Preferably the handle and its shank 81 are removably lconnected -with the elongated hub 77 of the rotatable member So that the handle may be disconnected therefrom when the pump is not in use. The disk 75 has formed in the periphery thereof a notch 84 adapted to receive a yieldable detent 85 when the disk is in its normal or idleposition, that is, when the pointer 83 indicates Zero. Consequently, when a customer wants a certain amount of liquid, say, ten gallons, the handle 82 will be manipulated to disconnect the rotatable member from the counter wheel and to set the pointer 83 at 10, the

detent 85 yielding to permit of the rotation of the disk or rotatable member. The pumping mechanism is then operated to cause the liquid to be delivered and when the counter wheel 39 has been advanced ten spaces the' notch 84 in 'the rotatable member 7 5 will again Ibe brought into alinement with the yieldable detent, which will enter the notch and thus check the movement of the rotatable member. The detent may be of such a character either to positively lock the device against further movement, or it may temporarily check the movement of the rotatable member so 'that greater force must be applied thereto before the movement can be continued, and thus indicate to the operator that the measurement has been completed. I prefer, however, to provide means controlled by this yieldable detent for positively locking the pumping mechanism against further movement, and which may be of such a character as to prevent the initial operation of the pumping mechanism until. the predetermining device has been set. To accomplish this, I have mounted on the operating shaft 3 of the pumping mechanism aratchet Wheel 86, with which acted upon by a spring 89 to hold it normally in engagement with ithe'ratchet wheel 86. Connected with'the Iawl 87 and arranged .on the opposite side of its axis is' a linger 9() which engages a second finger 91 pivotally mounted at 92 and rigidly connected with an arm 93 which is also mounted on the axis 92 and which carries the yieldable detent 85, the latter being in the form of a pin or roller extending transversely from the end of the arm 93. The arrangement of the parts is such that when the mechanism is in its normal or idle po- 1sition and the detent 85 lies in lthe recess 84 of the rotatable member 75, the pawl 87 will be in engagement with the ratchet wheel 86 and the forward movement of the operatin mechanism will be positively prevented. hen the rotatable member is actuated to set the predetermining. device, the detent or r'oller 85 will ride outvof the notch onto the periphery of the rotatable member, thus rocking the arm 93 and the finger 91 about their axes and causing said finger to engage the finger 90 and Athus move the pawl 87 against the tension of its spring and out of engagement with the ratchet wheel 86, thereby releasing the shaft 31 r operation. When the predetermined quantity of liquid has been delivered, the de tent 85 will again be opposite the notch 84 and the action of the spring 89 will serve to move the detent into the notch as well as to move the pawl 87 into engagement with the ratchet Wheel The operation of the mechanism as a whole will be readily understood from the description ofthe several parts thereof, and it will be apparent that I have provided in connect-ion with a dispensing pump, an apparatus which will indicate to the' customer both the quantity of liquid delivered and the price of that liquid; and further, that this apparatus will make a permanent printed record of the amount of liquid delivered, which record will be retained within the casing of the pump, andt-hat at the same 'to thepumping mechanism until. the prede-- termining device has been set.

While I have shown and described one embodiment of my invention, I Wish it to be understood that I do not desire to be a printing counter,

a printing counter,

l "a prmting counter, y

dispensing apparatus for said modifications will occur to a person skilled in the art.

tion,'what I claim as new vand desire to secure by Letters Patent is:

l. In a register for dispensing apparatus, means controlled by said dispensing apparatus for actuating said printing counter, means for supporting a strip of paper adjacent to said printing counter, a platen to take an impression from said printing counter on said aper, means for actuating said platen, an means con-v trolled by said operationof said platen for advancing the paper. p

2. In a register for dispensing al paratus, a printing counter, means controll by said dispensing apparatus for actuating said printing counter, means for supporting a strip of paper adjacent to said printing counter and comprisinga feeding device, an ink ribbon interposed betweenA said paper and said printin counter and means for actuating said ribbon, a platen, means for aetuati said platen to cause an impression to taken from said printing counter on said paper, and means controlled by said operation of said platen to actuate said paper feeding device and said ribbon actuating device.

3. In a register for dispensing apparatus, means controlled by said dispensing apparatus for actuating said printing counter, means for supporting a strip of paper adjacent to said printing counter and comprising a feeding device, an ink 'ribbon interposed between said paper and said printin counter and means for actuating said in ribbon, a platen, a rock arm to support said platen, a second arm connected with said rock arm, a bell crank j lever Ahaving one arm connected with said second'arm, and a link connectedwith the other arm of said bell crank lever and with said lplaper feeding device.

4. a register for dispensing apparatus, means controlled .by said a printing counter, means controll printingV counter, means for supporting a 'strip .of paper adjacent to said printing counter and comprising a feeding device, anv .Having thus fully described my invenink ribbon interposed between said paper and said printing counter, means for `actuating said ink ribbon, a platen, a rock arm to support said platen, a second arm connected with said rock arm, a bell crank lever having one arm connected with said second arm, a link connectedpwith the other arm of said bell crank lever and Withsaid paper feeding device, and a lsecond link te connect said ribbon actuating device.

5. In a. register for dispensing a paratus, by said dispensing apparatus .to cause said counter to record the amount of liquid delivered, a disk arranged adjacent to said printing counter having a notch in the periphery thereof, means for connecting said printing counter in di erent positions relatively thereto and Afor causing said disk to rotate with said counter when the latter is actuated, and a part adapted to enter said notch in said disk when the latter is in a predetermined position.

6. In a register for dispensing apparatus, a printing counter, means controlled bysaid dispensing apparatus to cause said counter to record the 'amount of liquid delivered, a disk arranged adjacent to said printing counter and having a notch in the periphery thereof, means for connectin said disk with said printing counter in dierent positions relatively thereto and for causing said disk to rotate with said counter when the lattery is actuated, a part adapted to enter said notch in said disk when the latter is in its normalr ing device for said dispensin apparatus, and an operative connection tween. said locking device and said part whereby the locking device will be rendered inoperative when said part is moved out of said notch.

In testimony whereof, I aur my signature hereto.

said disk withpaper feeding device with said tion, la normally operative lock- WILLIAM T. HATMAKER. 

